Re: How do i calculate a finish time when the start time is ambiguous? - Mailing list pgsql-general

From Octavio Alvarez
Subject Re: How do i calculate a finish time when the start time is ambiguous?
Date
Msg-id op.vs2izxv94oyyg1@alvarezp-ws
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In response to How do i calculate a finish time when the start time is ambiguous?  ("Rob Richardson" <Rob.Richardson@rad-con.com>)
List pgsql-general
On Mon, 28 Mar 2011 08:26:03 -0700, Rob Richardson
<Rob.Richardson@rad-con.com> wrote:

> I have a table that records a starting time for a process and the length
> of time that process will take, and I need to calculate the time the
> process will end.  I have the starting time both in local time and in
> UTC time, but for reasons which I consider totally idiotic, they are
> timestamp fields, not timestamptz fields.  My calculation must take into
> account the possibility that time will change from standard to daylight
> time or vice versa during the interval.
>
>
> But I'm having a difficult time coming up with a function that will use
> this information.

I suggest you calculate your finish time in UTC (since that number is not
ambiguous). You, then, do convert it to whatever TZ you need.

Cheers.

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